GETTING BETTER BASE OIL
Page 41
If you've noticed an error in this article please click here to report it so we can fix it.
In Group I base oils, solvents are used to extract impurities such as wax and aromatic molecules from the feedstock. However, with Group II oils, hydrocracking and catalytic dewaxing techniques are used to convert or remove significantly more of those feedstock impurities, especially unstable aromatic, sulphur and nitrogen-containing compounds.
It also improves the Viscosity stability (and ultimately lubitating performance) and oxidation stability of the base oil. Group II base oils give good low-temperature f loW too. Chevron will be the world's biggest supplier of Group II base oils post-2013 following a major production investment programme, The firm's Outhwaite says: "Two thirds of the world's premium base oil manufacture can be traced back to Chevron. We've got a lot of experience in developing these
modern oils; we're at the forefront of technology."